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<title>std::unordered_map&lt;Key,T,Hash,KeyEqual,Allocator&gt;::reserve</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::unordered_map&lt;Key,T,Hash,KeyEqual,Allocator&gt;::</span>reserve</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-container.html">container</a>&lrm; | <a href="cpp-container-unordered_map.html">unordered map</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> reserve<span class="br0">(</span> size_type count <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<p>&#35774;&#32622;&#26742;&#25968;&#20026;&#36866;&#24212;&#33267;&#23569; <code>count</code> &#20010;&#20803;&#32032;&#65292;&#32780;&#19981;&#36229;&#20986;&#26368;&#22823;&#21152;&#36733;&#22240;&#23376;&#25152;&#38656;&#30340;&#25968;&#65292;&#24182;&#37325;&#21704;&#24076;&#23481;&#22120;&#65292;&#21363;&#32771;&#34385;&#26742;&#25968;&#24050;&#26356;&#25913;&#21518;&#23558;&#20803;&#32032;&#25918;&#36827;&#36866;&#21512;&#30340;&#26742;&#12290;&#31561;&#25928;&#22320;&#35843;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp">rehash<span class="br0">(</span><a href="cpp-numeric-math-ceil.html"><span class="kw1350">std::<span class="me2">ceil</span></span></a><span class="br0">(</span>count <span class="sy2">/</span> max_load_factor<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span></span></span> &#12290;</p>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
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<p>&#24179;&#22343;&#24773;&#20917;&#19982;&#23481;&#22120;&#22823;&#23567;&#25104;&#32447;&#24615;&#65292;&#26368;&#22351;&#24773;&#20917;&#25104;&#24179;&#26041;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-container-unordered_map-rehash.html"><span class="t-lines"><span>rehash</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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<td>&#20026;&#33267;&#23569;&#20026;&#25351;&#23450;&#25968;&#37327;&#30340;&#26742;&#39044;&#30041;&#23384;&#20648;&#31354;&#38388;&#24182;&#37325;&#26032;&#29983;&#25104;&#25955;&#21015;&#34920;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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